Questions dealing with Ubuntu's layout of files, permissions, and files that reside in special locations on disk.

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7
votes
4answers
6k views

How does ecryptfs impact harddisk performance?

I have my home directy encrypted with ecryptfs. Does ecryptfs lead to fragmentation? I have the feeling that reading files, displaying folders and login became continuously slower and slower ...
7
votes
2answers
1k views

How to mount an internal HDD on start-up?

I have a 500GB internal HDD where I store all my music and photos but it is annoying to manually mount it after a restart and I was wondering how to mount it automatically and make it available to ...
7
votes
2answers
17k views

Is it safe to delete a lost+found folder?

I have an empty seperate partition used for my vhd/virtualbox. mounted at /mount/win7. I've deleted everything now and there's a lost+found folder left over. It takes up about 5gigs Is it safe to ...
7
votes
4answers
26k views

Why has my file-system turned read-only after updates?

I'm running 11.10 and I applied some updates. After that whenever I use my computer, I can, but only for about 2 or 3 minutes before it becomes read-only. Any sudo command entered gives me the ...
7
votes
3answers
9k views

Simple way to consistently access a SMB mount?

Is there any simple GUI way to make an SMB share persistent? I don't quite remember the steps, but on Windows, once you've mapped a share to a drive, you're given the option to 'reconnect on boot' (or ...
7
votes
4answers
2k views

Drive reporting incorrect free space

So I swapped my shiny SATA SSD for an even shinier PCI-E SSD. I run my core OS on the SSD because it's silly-fast. I did this on my old SSD so I created a new EXT4 partition and then just dded the ...
7
votes
1answer
1k views

What is stored in the “/var/lib/dpkg/updates” folder?

I've seen some folks have errors relating to files in /var/lib/dpkg/updates. All I can find about the directory is that the files in it are numbered 0000, 0001 etc. and that the error messages often ...
7
votes
1answer
2k views

How do I use gnome trash for files in different partition?

I have my files in a separate partition that is not mounted to /home, but only linked to it. How do I manage to be able to use the gnome trash in those files? For example: partion 2: mounted on ...
7
votes
2answers
975 views

Is the copy speed from ext4 to NTFS the same as from NTFS to NTFS?

I've created a file sharing server with Ubuntu server and samba, the drive for sharing is on ext4, but all the users are on windows 7/XP Would the copy speed be faster if the drive would be on NTFS?
7
votes
2answers
1k views

Are pre-existing files in a mountpoint directory safe and uneffected?

I've noticed that pre-existing files in a "mountpoint" directory disappear when the mount command is applied... and then they re-appear when the directory is unmounted. Are these files just on ...
7
votes
3answers
9k views

How well is the HFS+ filesystem supported?

How well does Ubuntu support HFS+ (i.e. Mac formatted) filesystems? Can it read and write to them, and are there any potential problems to watch out for?
7
votes
3answers
852 views

Files button on the side opens a new window instead of minimized window? [closed]

If I open my hard drive from the hard drive icon (I have 2 hard drives) and then I minimize it, it minimizes to the files and when I try to restore it it opens a new file manager (this happens weather ...
7
votes
2answers
6k views

How to convert ext2 to ext4?

I installed Ubuntu 12.10, and I don't know why, I have an ext2 partition. How can I convert this ext2 file system to an ext4? Will I lose all my data?
6
votes
3answers
3k views

Why do I get more free space than ext4 after formatting in XFS?

I've bought a 1TB external hard drive and after formatting the entire drive in ext4 Nautilus says there are 934.3 GB of free space. I've also tested formatting the drive in XFS, and in this case ...
6
votes
5answers
3k views

Filesystem filling up due to large uvcydnctrl-udev.log file

Now my installation of Ubuntu costs me more than 100 GB of the hard drive space. And whenever I try fslint and fdupes, they say Permission denied to delete the duplicates. Please help me guys. ...
6
votes
3answers
789 views

How can I find the total size of the contents of my Trash folder?

Is there any way I can find out exactly how much is in my Trash folder? I can see the size column, but if I have a folder in the trash, it shows the number of items in the folder rather than the total ...
6
votes
3answers
13k views

Location of file folders of installed programs

I'm new to Ubuntu and will like to know where i can find the location of program files of programs installed from the Ubuntu Software Center or the Command Line Interface
6
votes
1answer
3k views

Will 11.04 use other filesystem than ext4?

I heard something of a filesystem change. Is it gonna happen in 11.04?
6
votes
3answers
4k views

Fsck gets mad when the file system is mounted

When I run fsck -fy in a terminal it says something similar to: WARNING!! FILE SYSTEM MOUNTED!! You will cause seviere damages. Why is that? This might be a little off-topic but I ran that ...
6
votes
3answers
258 views

What's the difference between “cd ../” vs. “cd /..”?

What do these two commands mean? cd ../ cd /.. I am ending up in two directories upwards the tree on the first command and in the root directory from the second command. Why does that happen?
6
votes
3answers
10k views

ext4 partition size / free space discrepancies

While creating a 250GiB backup partition for my data, I have noticed lots of discrepancies between reported partition size and free space in Nautilus, gParted, df, tune2fs, etc. At first I thought it ...
6
votes
4answers
28k views

How to delete/edit files from readonly filesystem

I am having problem with my memory device (actually a memory card that act external memory device like pendrive). experimentx@workmateX:/var/www/zendtest$ sudo rm ...
6
votes
3answers
3k views

How to speed up rsync/tar of large Maildir?

I have a very large Maildir I am copying to a new machine (over 100BASE-T) with rsync. The progress is slow. VERY SLOW. Like 1 MB/s slow. I think this is because it is a lot of small files that ...
6
votes
2answers
214 views

I can continue playing a video after I Shift-Delete it. Is the disk-space freed when I close player?

I've noticed that I can actually Shift-Delete (ie. doesn't go to Trash) a video which is currently playing, and it still keeps on playing, even though there is no named reference to it in nautilus or ...
6
votes
3answers
12k views

Read-only SD cards

I've got an IcyBox USB hub/card reader combo in my computer, running Ubuntu 12.10. It's got an issue with SD cards. It always mounts them read-only, regardless of the write-lock switch. This is ...
6
votes
3answers
3k views

Why does every directory have a size 4096 bytes (4 K)?

As the subject says; I want to know why is every directory having a size equals to 4K even if they contain files with sizes greater than 4K. Please have a look at the following:- a) b) PS: I ...
6
votes
2answers
22k views

filesystem types for partitions [closed]

I am going to dual-boot install Ubuntu1 10.04 on my laptop with Windows 7. I was wondering what filesystem types (such as ext2, ext3, ext4, ReiserFS and whatever might come into mind) are ...
6
votes
1answer
711 views

Is My Filesystem Corrupt or Something?

OK, so for the past 2 days my Ubuntu Install (10.10) has been acting in a very strange manner. Just after the login process is done, and the desktop is loading everything seems to be fine, it is fast ...
6
votes
1answer
3k views

How to mount a remote (over SSH) directory to be available like a local directory (incl. in shell, not just in Gnome)?

I've got my files (mostly text/code, nothing of heavy like videos etc.) in a directory on a remote server which I can only access by means of SSH. Can I mount it on my laptop to use it seamlessly from ...
6
votes
2answers
2k views

Why has Ubuntu moved the default mount points?

Why has Ubuntu and many other Linux distributions moved the default mount points from /media to /media/$USER Example I plug in a USB drive and it's name is EXT4-250GB-USB it used to show up in ...
6
votes
2answers
15k views

The volume “filesystem root” has only 0 bytes disk space remaining?

I installed 11.10 ~two weeks ago and run into some strange troubles recently. Installation was on brand new laptop with clear 160GB SSD. I opted for encrypting home directory. Apart from that I ...
6
votes
2answers
9k views

How can I convert my root partition from BTRFS to EXT4?

Is it possible to convert btrfs to ext4 without losing data? I'm experiencing a very low speed on read/write operations on btrfs.
6
votes
2answers
5k views

What is the default character encoding?

I don't myself know how deep this question actually goes (for example, for all I know there could be several, depending on my task). Particularly, I am interested in what kinds of strings are used to ...
6
votes
1answer
5k views

How to get rid of unused jfsCommit processes?

On a Dell Poweredge T620 with Xeon hexacore processor, i notice that there are 14 extraneous processes for the jfs filesystem. On another server, there are similar processes for the xfs filesystem as ...
6
votes
3answers
3k views

What can I move to RAM drive to have the system working faster?

Which files/directories can I move to RAM drive to have the system working faster? I'm planning to upgrade my laptop's memory to 8GB soon, so I'll have some fast memory to use. How to configure the ...
6
votes
1answer
438 views

Where on the filesytem could a user find the Unity scope files?

I am wanting to find the Unity scope folder so that I can study how the scopes are set up and programmed. Where on the filesytem could I find the Unity scope files?
6
votes
2answers
2k views

Technical differences between ways in which UNIX and Windows “mount” devices

Question from which this arose is here: What does it mean to mount something? Since asking about which is "better" or which "worse" can lead to subjective and argumentative answers, I'd like to know ...
6
votes
2answers
579 views

Tell the kernel to strongly cache a particular directory

This question is a rephrasing of Optimizing EXT4 performance. I have a directory that contains build files, most very small, but totaling 5.6G. I usually access the same subset of files (some ...
6
votes
2answers
438 views

How can I create a filesystem “view” of a folder that excludes certain files?

I want to have a path in the filesystem that shows the entire contents of some other path, excluding a few certain files of my choosing. For example, if the following already exists, original-path ...
6
votes
3answers
869 views

Symlinks and their paths are confusing - how can they be used effectively?

When exploring directories from a symlink (symbolic link) using Nautilus or Gnome Commander, the directory structure is displayed as if the symlink were a regular directory. When I open a document, ...
6
votes
1answer
2k views

What is a safe ulimit ceiling?

This is the output of ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) ...
6
votes
1answer
2k views

System displays “File system maintenance error, press ctrl+d” while booting

In my office I've Ubuntu 8.10 desktop installed and it's running for a long time. When ever the system is started, I'll get a file system maintenance error and something it's prompted for the root ...
6
votes
1answer
1k views

How do I make noatime mounts default?

I'm making an Ubuntu derivative, and I want to make noatime the default mount option for all filesystems (instead of relatime which is default in Ubuntu). There seems to be a boolean default_relatime ...
6
votes
3answers
983 views

1TB SATA HDrive on Marvell Adapter disappears after 10.10 upgrade - Why?

Thanks for taking the time. I have a problem I've never had after an upgrade. One of my hard drive, a 1TB NTFS drive connected with the marvell SATA connector (88sx or smth like that ) to my Asus ...
6
votes
2answers
8k views

Why does Ubuntu 13.10 not detect my Win7 partition?

I'm trying to install Ubuntu 13.10 alongside Windows 7 on my DELL INSPIRON 14z 5423 laptop and I'm new to all of this. I'm using the Ubuntu 13.10 64-bit ISO burned onto a CD. The first time I tried ...
6
votes
1answer
694 views

File operations freeze when putting files larger than 10MB on an SD card [closed]

I have the newest Ubuntu 13 with all updates. When copying files to my 32GB SD card, the file operations freeze just before it finishes. It does not complete. Files greater than 10MB do this. ...
5
votes
5answers
7k views

How to enter to the directory with 'cd' command if it has 700 permission

I tried to use sudo cd name_of_dir but getting following error message: sudo: cd: command not found. Is there any other way to open a directory which has 700 permission?
5
votes
4answers
913 views

Ubuntu won't allow to use “/” symbol

I'm trying to rename directory and I need to use "/" symbol but ubuntu won't allow it. Is where any way to "cheat" ubuntu into allowing me to use it?
5
votes
3answers
3k views

The best choice of linux file system and software that can be accesed from Windows

I am curently having ubuntu and win 7 dual boot and I want to delete my windows 7 and format all my partitions to use a linux file system. But I want to leave a door open in case I have any problems ...
5
votes
2answers
666 views

Where is the journal stored?

I was reading trough the link on journaling-filesystems and i would like to know where exactly is the journal stored in my Harddisk. Some pointers on this image shown below Thanks, Sen